Quantitative risk assessment

58. Which value per year is considered as the negligible risk?

X10-8 per year

59. How is the value of acceptable risk determined?

The value of acceptable risk is determined by the level of development of society and the pace of scientific - technical progress

60. What are the stages of risk analysis?

First stage: a preliminary analysis of risk.

Second stage: identification of a sequence of dangerous situations.

Third stage: analysis of the consequences.

61. What is the purpose of the first stage of risk analysis?

1) Identification of sources of risk (for example, is it possible leakage of toxic substances, explosions, fires, etc.?)

The definition of parts of the system (subsystems) that can cause the hazardous conditions (chemical reactors, tanks and storage facilities, power plants, etc.)

62. What is the purpose of the second stage of risk analysis?

methods:

Constructing a tree of events;

Constructing a tree of failures.

Risk analysis in the second stage begins with tracing the sequence of possible events, ranging from the initiating event (the destruction of the pipeline of the refrigeration unit), the probability is equal to the РA.

63. What is the purpose of the third stage of risk analysis?

Analysis of the consequences.

64. How does the analysis of failure modes and effects differ from the analysis using the failure tree?

Analysis of failure modes and effects is significantly more detailed than the analysis using the failure tree, as it is necessary to consider all possible types of failures or accidents for each element of the system.

65. Which information does the analysis of criticality provide?

This type of analysis provides the classification of each item in accordance with the degree of its influence on the overall purpose of the system.

66. Which of the methods of risk analysis have no disadvantages?

Preliminary hazard analysis

67. Which parameters of the method of risk evaluation provide an increase of life expectancy?

68. What are the three major methods of cardiopulmonary resuscitation set forth in the “Rules for ABC”?

A - ensuring airway passage.

B – performing artificial respiration.

C - restoration of blood circulation.
69. What should be the frequency of the inhalation when performing an artificial lung ventilation (ALV) by "donor’s" method?

The frequency of the inhalation cycles should be 12-15 per minute e.g. one inhalation per 5 sec.

70. What are the signs of sudden cardiac arrest?

The signs of sudden cardiac arrest - sudden pallor, loss of consciousness, loss of pulse in the carotid arteries, the cessation of breathing or the appearance of rare, convulsive breaths, dilated (widened) pupils

71. What are criteria of the effectiveness of indirect cardiac massage?

The cardiac massage is the most effective when started immediately after cardiac arrest.

The effectiveness of indirect cardiac massage is ensured by the correct application of the pressure to the victim's chest (lower half of the sternum).

72. What should be the frequency pace when performing an indirect cardiac massage?

Frequent pace - about 15 contractions of the heart in 12 seconds, then for 3 seconds - 2 energetic air blows into the lungs; 4 such cycles performed per minute, and totally - 60 contractions of the heart and 8 inhalations.

73. What kind of bleeding is referred to as internal hidden bleeding?

Date: 2015-12-11; view: 794